Improvement in machines for trimming stave-blanks



Y v2 Sheets-Sheet 2.

, 1a. RMT.v MACHINE Fon'TRmMING srAvE BLANES. y r

' No.`183,417. v Patented oct.17,1e76.

www 9%@ @wf- UMTED Sfrrrrnsy PATENT QrFIcE.

DAVID RAIT, OFBROOKLYN, N. Y., ASSIGNOR TO HENRY T. RICHARDSON.

IMPROVEMENT IN MACHINES EOR TRIMMING STAVE-BLANKS.

v K x y Specification forming part of Letters Patent No. 183,417, dated October 17, 187.6; application filed August 14, 1876.

in the county of Kings, and in the State of New York, have invented certain new and useful Improvements in Apparatus for Trimming Staves, Butts, Heading, Sto.; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a perspective view of my improved machine as arranged for use, the full lines showing the cutting-head in an elevated position, while the dotted lines show said part depressed. Fig. 2 isa central longitudinal section of the same; and Fig. 3 is a vertical section upon line a: a: of Fig. 2.

Letters of like name and kind refer to like parts in each of the figures.

In the manufacture of staves it is customary to rive the log upon radial lines, so that the staves furnished Afor shipment have the form, transversely, of segments of a circle, being widest upon the outer or sap portion and narrowest at their inner or heart edge, in which shape said staves are difficult to haul and stow away for transportation, and cause a large and an unnecessary expense for the transportation of surplus stock. To remedy these objections and enable the staves to be reduced in the forest to a proper size and form is the design of my invention; which consists, principally, in the employment of two cutters or knives, secured in parallel lines upon a head, and capable of being moved vertically and caused to impinge upon a stave and remove from its sides all surplus stock, substantially as is hereinafterspecied.

It consists, further, in the means employed for confining in position the stave being operated upon, substantially as is hereinafter shown.

It consists, further, in the means employed for giving to said knives a shearing or hewing cut, substantially as and for the purpose hereinafter set forth.

It consists, further, in the machine, as a whole, its several parts being constructed and combined to operate in the manner and for the purpose substantially as herein after shown and described.

It consists, finally, in the means employed for confining the stave in position while its edges are being trimmedsubstantially as is lines, and are secured together at their upperA and lower ends, respectively, by means of a cross-bar, B, and a base, C. Said base andthe lower portions of said standards have several times the width of said cross-bar B, s as to afford a firm bearing for the machine. Upon the inner face, at the transverse center of each standard A,is secured a Way or guide, D, which is preferably A-shaped, and upon and between the same is fitted a block, E, that at its ends is provided with bearings c, which correspond to and embrace said ways and enable said block to be moved vertically thereon. A lever, F, pivoted near its center to or upon the upper side of the frame, and connected with the block E by a cord or chain, Gr, that extends between the'upper end of said lever and the upper side at the longitudinal center of said block, enables the latter to be raised or lowered .at will.

Upon each side of the block or sliding head E is secured a cutter or knife, H, which has nearly as great length, and extends downward to a distance below said head somewhat greater than the width of the stave to beoperated upon. The base C has, preferably, at its upper side an inclination from end to end, as seen in Fig. 2, and within its face is provided with grooves cand c, which vcorrespond in size and horizontal position to the cutters H and H, and receive the lower cutting-edges of the same when the head E is lowered. Between the grooves c and c a block, I, is secured to or upon the inner face at thelower end of each standard A, which block has its inner face formed upon a line, which has a right angle to the inclined face of the base C. The distance between the blocks I and I is slightly greater than the length of the stave to be operated upon, and when such stave K is placed between said blocks upon the base G it is .locked in placeby a screw, L, which passes inward through the standard A, and at its in- -ner end engages with the contiguous end of If desired, a screw, L, may bek-provided at each endiof the stave K, or thel` blocks I' and I may be made of.metal, with their inner faces roughened and arranged to be moved inward and outward by said screws, and engage with theends of said stave. An opening, a', provided in oneof the standards A enables the stave to be inserted to or removed from place.

As thus constructed, the machine 4isready for use, as follows: A stave being placed in position, the sliding head is raised and permitted to fall until its cutters have removed the surplus material from the sides of said stave and reduced the same to an uniform thickness. If any of the heart or sap remains upon the edge of the stave, the same may be removed by placing `said staveupon its side with the heartor'sap portion-'extended inwardbeyond the line of cut of the contiguousV knife, 'and then causing the latter to impingeupon said stave, a-s before. Inorder that the stave may be held in position while being thus trimmed at its edges, a cleat, M, is secured to theinner face of each standard, parallel with and at a suitabledistance above the basel), to permit said staveto be passed beneath. In consequence of theinclination'of the base, the cutters have a shearing cut withthe grain, and do not injure or tear the wood being operated upon; but if said `base isi-constructed with a horizontal face and `the lower edges of `said cutters are inclined, the same `resultwill be produced.

`The machine thus described *may be constructed in pieces, so as to be readily moved by the operators as they change positionsfin the woods.

While intended for use in trimmingstaves,` the mechanism describedmay with equal facilitybe employed for dressing `wainscot,billets, butts, bolts, heading, and `any form of rived timber.

Having thus fully "set' forth the nature'and merits of my invention, whatl I claimas new 1sport forthefmaterialbeingoperated upon, lin

combination with each other and with the mechanism for raising andreleasing said head, substantially asand for the'purpose specified.

2. rEhe -mea'ns employed for securing the stave-blank in place, consisting of blocks I land I, secured toor upon tlieinnerrfaceslof thefstandards A and A, and the screw L, passrocate vertically, the base C, provided with thegrcoves c and c, and having an `inclination ofits 1upper face with relation to thelne ofthe cutting-edges cfs-aid cutters, substantially a and for the purpose set fort-h. l

4. The standards A and A, cross-bar B,

base C c c, guides D and D, sliding head E,

lever F, cord Gr, cuttersII and H, end blocks I and I, and screws L and L, all constructed 4andcombined to `operate in the manner and for tlieipurpose substantially asshown and described.

5.1 In combination with thestandards A and A, the base G, and with the vertically-reciprocatingcutters Hand- H, thec'leats M and M,

"secured upon said standards, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand i this 12th dayof August, 1876.

DAVID RAIT.

Witnesses JOHN EAJJIE, GEO. W. QUAoKENBoss. 

